Sarcocystis spp Flashcards Preview

My Parasit Exam 2 > Sarcocystis spp > Flashcards

Flashcards in Sarcocystis spp Deck (15):
1

hosts

dogs, cats, humans, other carnivores

2

intermediate hosts

cattle, herbivores, omnivores, birds

3

size

18 micrometers

4

sporocysts sporulate inside the ____ before being passed in the feces

intestine

5

sporulated oocysts contain

2 sporocysts each with 4 sporozoites

6

the life cycle includes _____ in the final host and _____ and _____ in the intermediate host

gametogony, schizogony, sarcocyst formation

7

what happens in the final host?

gametogony-
host ingests mature sarcocysts with bradyzoites in intermediate host
bradyozoites are liberated and differentiate into micro and macro gametocytes
fertilization of gametes forms oocysts
oocysts sporulate in the body

8

what happens in the intermediate host?

schizogony-
ingestion of sporocysts from infected final host
1st asexual generation- sporozoites release from sporocysts where they go into endothelial cells and undergo 2 schizogonous cycles
third asexual cycle in lymphocytes with resulting merozoites penetrating muscle cells
they encysts and bud and give rise to bradozoites in a cyst

9

what is the infective stage for the carnivorous host?

bradozoites contained within a cyst

10

PPP for carnivores:

7-14 days

11

how long does it take for ingested sporocysts to turn to bradyzoites in intermediate hosts?

2-3 months

12

site of infection

muscles in intermediate hosts, gastrointestinal tract in final host

13

pathogenesis

no illness in final host, but intermediate host may have serious or fatal disease

14

diagnosis

bradyzoites in muscle tissue of intermediate host or sporocysts in final host

15

treatment

cooking meat and preventing fecal contamination from final host